Punnett Squares

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the outcome of a particular cross or breeding experiment, showing the possible combinations of alleles from the parents.

Front

How many alleles does a child inherit from each parent for each trait?

Back

A child inherits 1 allele from each parent for each trait.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene, such as AA or aa.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene, such as Aa.

Front

What is the genotype for a homozygous dominant trait?

Back

The genotype for a homozygous dominant trait is represented as AA.

Front

What is the genotype for a homozygous recessive trait?

Back

The genotype for a homozygous recessive trait is represented as aa.

Front

What is the expected phenotype ratio from a cross between a heterozygous parent and a homozygous recessive parent?

Back

The expected phenotype ratio is 50% dominant trait and 50% recessive trait.

Front

What is the significance of the X and Y chromosomes in determining gender?

Back

The presence of one X and one Y chromosome (XY) determines a male, while two X chromosomes (XX) determine a female.

Front

What is the expected genotype from crossing a homozygous dominant parent with a homozygous recessive parent?

Back

The expected genotype from this cross is 100% heterozygous (Ww).

Front

What does the letter 'D' represent in genetic notation?

Back

In genetic notation, 'D' typically represents the dominant allele for a trait, such as dimples.